Docstoc

CONTROL AND COORDINATION

Document Sample
CONTROL AND COORDINATION Powered By Docstoc
					                                          CONTROL AND COORDINATION
Definitions
Neuron, Synapse, Receptors, Gustatory receptors, Olfactoreceptors, Phono receptors, Dendrite, Axon , Nerve endings,
Reflex action, Sensory neuron , Motor neuron, Reflex arc, Central nervous system, Peripheral nervous system, Cranial
nerves, Spinal nerves, Voluntary actions, involuntary actions, Tropic movements, Geotropism , Hydrotropism,
Chemotropism, Plant hormones, Endocrine glands, Goitre, Dwarfism, Gigantism, Diabetes.
Diagrams
Structure of neuron, Neuromuscular Junction, Reflex arc, Human Brain, Endocrine glands in human beings.
List the functions of the following
Dendrites, Axon, nerve Ending, Receptors, Sensory nerve, Motor nerve, Cerebrum, Cerebellum, Medulla oblongata, Plant
hormones, Auxin, Cytokinins, Abscisic acid, Gibberellins, Thyroxin, Growth hormones, Adrenalin, Testosterone,
Oestrogen, Insulin.
Give Reason for the following.
     1. Plants bends towards the direction of light,
     2. .Intake of iodised salt is advisable,
     3. .Diabetes is treated by giving insulin injection.
     4. We will withdraw our hand on touching hot object.
     5. Leaves of “touch me not “ will droop on touching it.
     6. Sexual characters will develop only after certain age.
     7. Tendrils will circles around any support with which it comes in contact.
     8. Growth in plants is steady and consistent.9) Reflex arc is absent in invertebrates.
Distinguish between
Chemical control and nervous control, growth dependent movements and growth independent movements in plants,
Coordination in plants and animals,
Reflex action and walking, Voluntary muscle and involuntary muscles, Movement of shoot towards light and movement of
leaf in “sensitive plant”
Answer the following questions
     1. What is the need for system for the control and coordination in an organism?
     2. How does impulse transmission occurs in animals?
     3. What are the advantages and disadvantages of nervous coordination?
     4. What happens at the synapse between two neurones?
     5. Illustrate “reflex action “ with the help of suitable examples.(Trace the sequence of events which occurs when we
          touches hot object)
     6. What is the role of brain in reflex action?
     7. What are the major regions of brain? List the role of each region.
     8. What will happen if the spinal cord get injured?
     9. How do we detect fragrance of perfumes?
     10. How are the nervous tissues protected?
     11. How the mechanism of changing the shape of the cell in plants differ from that in animals?
     12. How do adrenaline helps to over come scary situations?
     13. List the plant hormones under growth promoters and growth inhibitors.
     14. How do plant hormones differ from hormones in animal?
     15. What re receptors? What is its significance?
     16. How the movement of leaves in touch me not plant and movement of limb in animals differ each other?
Complete the following table
Name of endocrine gland                   position          Name hormone secreted             Functions (Role)
Pituitary gland
Thyroid gland
Adrenal gland
testis
Ovary
Pancreas
                            Control and Coordination


(Q.1) Which part of the brain does give rise to spinal cord?                  ( 1 mark )
(Q.2) The secretions of the endocrine glands are called hormones. Which of
                                                                              ( 1 mark )
the following characteristics is not shown by the hormones?
(a) They may be proteinaceous or non-proteinaceous (amino acids or steroids).
(b) Their secretion may be regulated by nerves or by feedback effect.
(c) They act at their site of release.(d) They are transported by blood.


(Q.3) What are the names of future shoot and future root in a germinating
                                                                              ( 1 mark )
seed?
 (Q.4) The changes associated with puberty in males & females is due to the
                                                                              ( 1 mark )
secretion of:
(a) Oestrogen/ Testosterone
(b) Testosterone / Oestrogen
(c) Oestrogen / Growth hormone                                                ( 1 mark )
(d) Growth hormone / Testosterone
(Q.5) What is the pricking of pin called?
(a) Response
(b) Stimulus
(c) Reaction                                                                  ( 1 mark )
(d) Reflex.
(Q.6) Control and coordination is provided by:
(a) Muscular System
(b) Excretory System
(c) Nervous System                                                            ( 1 mark )
(d) Reproductive System
(Q.7) All information from the environment is detected by:
(a) Receptors
(b) Axon
(c) Nucleus
                                                                              ( 1 mark )
(d) Cell Body
(Q.8) The information acquired at the end of the dendritic tip sets off a
chemical reaction. This creates an:
(a) Action
(b) Reaction
(c) Electrical Impulse
                                                                              ( 1 mark )
(d) Potential
(Q.9) During nerve impulse transmission, the chemicals cross a region
called:
(a) Synapse
(b) Reflex Arc
(c) Dendrite                                                                  ( 1 mark )
(d) Neuromascular junction
Q.10) The nervous tissue is made up of:
(a) Grey matter
(b) Nerve cells                                                               ( 1 mark )
(c) Axon
(d) Dendron
(Q.11) The thinking part of the body is called:
(a) Kidneys
(b) Brain
(c) Lungs                                                                           ( 1 mark )
(d) Heart
(Q.12) The process of detecting the input and a quick response to it is called:
(a) Impulse
(b) Stimulus
(c) Sensation
(d) Reflex action
(Q.13) Reflex arcs are formed in the:                                               ( 1 mark )
(a) Brain
(b) Spinal Cord
(c) Muscles                                                                         ( 1 mark )
(d) Kidneys
(Q.14) Reflex arcs have evolved in animals because:
(a) Spinal cord is required.
(b) Thinking process of brain is not fast enough.
(c) Muscles do not work properly.                                                   ( 1 mark )
(d) Reception is not proper in animals.
(Q.15) Which of the following constitute the Central Nervous System:
(a) Axon
(b) Spinal cord
(c) Muscle fibre
(d) Reflex arc
(Q.16) The communication between CNS and other parts of the body is
                                                                                    ( 1 mark )
facilitated by:
(a) Peripheral Nervous System(b) Brain
(c) Spinal Cord(d) Reflexes.


(Q.17) Involuntary actions like blood pressure, vomiting and salivation are
                                                                                    ( 1 mark )
controlled by:
(a) Cerebral Cortex(b) Fore brain
(c) Mid brain
                                                                                    ( 1 mark )
(d) Hind brain
(Q.18) The brain is protected by:
(a) Cranium
(b) Vertebral Column
(c) Spinal Cord
                                                                                    ( 1 mark )
(d) Joints
(Q.19) Activities like walking in a straight line, riding a bicycle, picking up a
pencil are controlled by:
(a) Cerebrum
(b) Cerebellum
(c) Medulla Oblongata                                                               ( 1 mark )
(d) Spinal Cord
(Q.20) The response seen in Mimosa pudica is:
(a) Heat related
                                                                                    ( 1 mark )
(b) Touch related
(c) Cold related
(d) Chemically related
(Q.21) The part of the plant that is positively geotropic in nature is:
(a) Root
(b) Stem
(c) Leaf
                                                                             ( 1 mark )
(d) Flower
(Q.22) The element required for the thyroid gland to make thyroxine
hormone is:
(a) Calcium
(b) Phosphorus
(c) Iodine                                                                   ( 1 mark )
(d) Magnesium
(Q.23) Adrenal glands are located above these organs:
(a) Kidneys
(b) Lungs
(c) Intestine                                                                ( 1 mark )
(d) Stomach
(Q.24) Which of the following is a plant hormone:
(a) Insulin
(b) Thyroxin
(c) Oestrogen                                                                ( 1 mark )
(d) Cytokinin
(Q.25) The timing and amount of hormone released are regulated by:
(a) Reflex action
(b) Brain
(c) Spinal Cord                                                              ( 1 mark )
(d) Feed back mechanism
(Q.26) The sugar level in the blood is controlled by:
(a) Adrenal gland
(b) Thyroid gland
(c) Pancreas                                                                 ( 1 mark )
(d) Liver
(Q.27) The hypothalamus, pineal gland and pitutary gland are located in the:
(a) Brain
(b) Kidneys
(c) Lungs                                                                    ( 1 mark )
(d) Heart
(Q.28) Which group of multicellular animals do not posses neurons?
(Q.29) Name the chemical substances which control and coordinate in
                                                                             ( 1 mark )
plants.
(Q.30) What is tropism?                                                      ( 1 mark )
(Q.31) Name the longest cell in our body.                                    ( 1 mark )
(Q.32) What is cranium?                                                      ( 1 mark )
 (Q.33) Why are endocrine glands also known as ductless glands?              ( 1 mark )
(Q.34) Insulin is produced by:                                               ( 1 mark )
(a) Liver
(b) Pancreas
(c) Gall bladder(d) Stomach
(Q.35) Cytokinins promotes                                                ( 1 mark )
(a) Wilting of leaves
(b) Cell division
(c) Responses                                                             ( 1 mark )
(d) Diffussion
(Q.36) The hormones secreted at puberty in males and females are:
(a) Testosterone and estrogens respectively
(b) Estrogens and testosterone and respectively
(c) Androgens and testosterone respectively
                                                                          ( 1 mark )
(d) Estrogens and progestrone respectively
(Q.37) Connections between input nerve and output nerve where they meet
first forms:
(a) Reflex arc
(b) Cranial nerves
(c) Spinal nerves                                                         ( 1 mark )
(d) Neuromuscular junction
(Q.38) In order to perform an action or movement animal muscles:
(a) Change their shape and shorten
(b) Change their shape and bulge
(c) Do not change their shape                                             ( 1 mark )
(d) They shift to the target organ
(Q.39) Which one of the following is positively hydrotropic:
(a) Leaves
(b) Stem
(c) Flowers                                                               ( 1 mark )
(d) Roots
(Q.40) The time and amount of hormone released is controlled by:
(a) Pars distalis
(b) Endocrine glands
(c) Feedback mechanism                                                    ( 1 mark )
(d) Hypothalamus
(Q.41) Which of the following is not regulated by the hormones?
(a) Metabolism
(b) Growth
(c) Sexual development                                                    ( 1 mark )
(d) Thinking
(Q.42) The term geotropism means:
(a) Study of different layers of earth
(b) Shifting of earth centre
(c) Growth of plant parts towards gravity of the earth
                                                                          ( 1 mark )
(d) Putting seeds into soil bed
(Q.43) Which of the following can be quoted as the best example for
Chemotropism.
(a) Pollen tubes
(b) Flowers
(c) Roots                                                                 ( 1 mark )
(d) Stem
(Q.44) Where are hormones poured into the body?
(a) Blood stream
(b) Pancreas
                                                                          ( 1 mark )
(c) Intestine
(d) Brain
(Q.45) The nervous system consists of a series of:
(a) Cytons
(b) Neurons
(c) Dendrons                                                                  ( 1 mark )
(d) Axons
(Q.46) Which one of the following is an involuntary action?
(a) Breathing
(b) Cycling
(c) Walking
(d) Picking                                                                   ( 1 mark )
(Q.47) The coordination by chemicals is brought about by:
(a) The endocrine system
(b) Spinal cord
(c) Nervous system
(d) Brain




(Q.48) Iodine is necessary for which endocrine gland:                         ( 1 mark )
(a) Gonads
(b) Hypothalamus
(c) Thymus                                                                    ( 1 mark )
(d) Thyroid
(Q.49) Example of chemical coordination in plants is:
(a) Seed germination
(b) Growth of hairs
(c) Seed shape in pea
                                                                              ( 1 mark )
(d) Development of cambium
(Q.50) The entire path of detecting the signal or the input and responding to
itby an output action is commonly called as:
(a) Impulse
(b) Synapse
(c) Reflex                                                                    ( 1 mark )
(d) Stimulus
(Q.51) What is an endocrine system?
(a) A system of electrical impulses to transmit messages
(b) A collection of glands that produce hormones
(c) A collection of nerves that produce reflexes                              ( 1 mark )
(d) A groups of neurosecretory cells which secrete hormones
(Q.52) Plant hormones:
(a) shape the plant
(b) effect water transporation in plant
(c) effect in pollination
                                                                              ( 1 mark )
(d) effect in seed dispersal
(Q.53) Activities like walking, riding a bicycle, picking up a pencil are
controlled by
(a) Fore brain
(b) Hind brain
(c) Mid brain                                                                 ( 1 mark )
(d) Spinal cord
(Q.54) Back bone is also called as
(a) Spinal cord
(b) Notochord
(c) Vertebral column
(d) Nerve cord
(Q.55) Which of the following is not an endocrine gland?                      ( 1 mark )
(a) Pineal
(b) Thyroid
(c) Pancreas
(d) Sweat
(Q.56) Which of the following part of the brain gives rise to spinal cord?    ( 1 mark )
(a) Medulla oblongata
(b) Cerebrum
(c) Cerebellum                                                                ( 1 mark )
(d) Mid brain
(Q.57) Plants hormones are:
(a) Nutrients
(b) Chemicals
(c) Minerals                                                                  ( 1 mark )
(d) Vitamins
(Q.58) The production of hormones occurs:
(a) In xylem
(b) In phloem
(c) In cortical cells
                                                                              ( 2 Marks )
(d) In meristematic cells
(Q.59) What are plant hormones? What is the relationship between their site
of production and site of action?
(Q.60) What is insulin? Where is it produced?                                 ( 2 Marks )
(Q.61) How are the time and amount of hormone released, controlled?
                                                                              ( 2 Marks )
Explain with example.
(Q.62) What are the two ways of control and coordination in animals?          (2   Marks )
 (Q.63) What are two different types of plant movements?                      (2   Marks )
(Q.64) Name the hormones secreted at puberty in males and females?            (2   Marks )
(Q.65) Does thinking also involve the creation of nerve impulses?             (2   Marks )
(Q.66) How are the brain and spinal cord protected in human body?             (2   Marks )
(Q.67) How do animal muscles move in order to perform an action or
                                                                              ( 3 Marks )
movement?

(Q.68) How are the animal movements different from that of plant
                                                                              ( 3 Marks )
movements?
 (Q.69) Explains the terms geotropism, hydrotropism and chemotropism
                                                                              ( 3 Marks )
each with one example.
(Q.70) Why is iodine salt necessary for our body?                             ( 3 Marks )
(Q.71) Why are some people very short and others very tall?                   ( 3 Marks )
(Q.72) What is reflex arc? Where is it formed?                                ( 3 Marks )
(Q.73) What are involuntary actions? Name few. Which parts of brain control
                                                                              ( 3 Marks )
these actions?
(Q.74) How are the information and decision processed in the forebrain?       ( 3 Marks )
(Q.75) What is the general scheme of nerve impulses traveling in our body?    ( 5 Marks )
(Q.76) Draw the well-labelled figures of human brain.                         ( 5 Marks )
                               Control and Coordination
(Q.1) Which part of the brain does give rise to spinal cord?                  ( 1 mark )
(Q.2) The secretions of the endocrine glands are called hormones. Which of
                                                                             ( 1 mark )
the following characteristics is not shown by the hormones?
(a) They may be proteinaceous or non-proteinaceous (amino acids or
steroids).
(b) Their secretion may be regulated by nerves or by feedback effect.
(c) They act at their site of release.                                       ( 1 mark )
(d) They are transported by blood.
(Q.3) What are the names of future shoot and future root in a germinating
seed?
(Q.4) The changes associated with puberty in males & females is due to the
                                                                             ( 1 mark )
secretion of:
(a) Oestrogen/ Testosterone
(b) Testosterone / Oestrogen
(c) Oestrogen / Growth hormone                                               ( 1 mark )
(d) Growth hormone / Testosterone
(Q.5) What is the pricking of pin called?
(a) Response
(b) Stimulus
(c) Reaction                                                                 ( 1 mark )
(d) Reflex.
(Q.6) Control and coordination is provided by:
(a) Muscular System
(b) Excretory System
(c) Nervous System                                                           ( 1 mark )
(d) Reproductive System
(Q.7) All information from the environment is detected by:
(a) Receptors
(b) Axon
(c) Nucleus
                                                                             ( 1 mark )
(d) Cell Body
(Q.8) The information acquired at the end of the dendritic tip sets off a
chemical reaction. This creates an:
(a) Action
(b) Reaction
(c) Electrical Impulse
                                                                             ( 1 mark )
(d) Potential
(Q.9) During nerve impulse transmission, the chemicals cross a region
called:
(a) Synapse
(b) Reflex Arc
(c) Dendrite                                                                 ( 1 mark )
(d) Neuromascular junction
(Q.10) The nervous tissue is made up of:
(a) Grey matter
(b) Nerve cells
(c) Axon                                                                     ( 1 mark )
(d) Dendron
(Q.11) The thinking part of the body is called:
(a) Kidneys
(b) Brain
                                                                             ( 1 mark )
(c) Lungs
(d) Heart
(Q.12) The process of detecting the input and a quick response to it is called:
(a) Impulse
(b) Stimulus
                                                                                    ( 1 mark )
(c) Sensation(d) Reflex action
(Q.13) Reflex arcs are formed in the:
(a) Brain
(b) Spinal Cord(c) Musclesd) Kidneys
(Q.14) Reflex arcs have evolved in animals because:                                 ( 1 mark )
(a) Spinal cord is required.
(b) Thinking process of brain is not fast enough.
(c) Muscles do not work properly.                                                   ( 1 mark )
(d) Reception is not proper in animals.
(Q.15) Which of the following constitute the Central Nervous System:
a) Axon
(b) Spinal cord
(c) Muscle fibre
                                                                                    ( 1 mark )
(d) Reflex arc
(Q.16) The communication between CNS and other parts of the body is
facilitated by:
(a) Peripheral Nervous System
(b) Brain
(c) Spinal Cord
                                                                                    ( 1 mark )
(d) Reflexes.
(Q.17) Involuntary actions like blood pressure, vomiting and salivation are
controlled by:
(a) Cerebral Cortex
(b) Fore brain
(c) Mid brain                                                                       ( 1 mark )
(d) Hind brain
(Q.18) The brain is protected by:
(a) Cranium
(b) Vertebral Column
(c) Spinal Cord
                                                                                    ( 1 mark )
(d) Joints
(Q.19) Activities like walking in a straight line, riding a bicycle, picking up a
pencil are controlled by:
(a) Cerebrum
(b) Cerebellum
(c) Medulla Oblongata                                                               ( 1 mark )
(d) Spinal Cord
(Q.20) The response seen in Mimosa pudica is:
(a) Heat related
(b) Touch related
(c) Cold related                                                                    ( 1 mark )
(d) Chemically related
(Q.21) The part of the plant that is positively geotropic in nature is:
(a) Root
(b) Stem
(c) Leaf
                                                                                    ( 1 mark )
(d) Flower
(Q.22) The element required for the thyroid gland to make thyroxine
hormone is:
(a) Calcium
(b) Phosphorus
(c) Iodine                                                                     ( 1 mark )
(d) Magnesium
(Q.23) Adrenal glands are located above these organs:
(a) Kidneys(b) Lungs
(c) Intestine(d) Stomach                                                       ( 1 mark )
(Q.24) Which of the following is a plant hormone:
(a) Insulin
(b) Thyroxin
(c) Oestrogen                                                                  ( 1 mark )
(d) Cytokinin
(Q.25) The timing and amount of hormone released are regulated by:
(a) Reflex action
(b) Brain
(c) Spinal Cord                                                                ( 1 mark )
(d) Feed back mechanism
(Q.26) The sugar level in the blood is controlled by:
(a) Adrenal gland
(b) Thyroid gland(c) Pancreas(d) Liver
(Q.27) The hypothalamus, pineal gland and pitutary gland are located in the:   ( 1 mark )
(a) Brain
(b) Kidneys
(c) Lungs                                                                      ( 1 mark )
(d) Heart
(Q.28) Which group of multicellular animals do not posses neurons?
(Q.29) Name the chemical substances which control and coordinate in
                                                                               ( 1 mark )
plants.
(Q.30) What is tropism?                                                        (1   mark   )
(Q.31) Name the longest cell in our body.                                      (1   mark   )
(Q.32) What is cranium?                                                        (1   mark   )
(Q.33) Why are endocrine glands also known as ductless glands?                 (1   mark   )
(Q.34) Insulin is produced by:                                                 (1   mark   )
(a) Liver
(b) Pancreas
(c) Gall bladder                                                               ( 1 mark )
(d) Stomach
(Q.35) Cytokinins promotes
(a) Wilting of leaves
(b) Cell division
(c) Responses                                                                  ( 1 mark )
(d) Diffussion
(Q.36) The hormones secreted at puberty in males and females are:
(a) Testosterone and estrogens respectively
(b) Estrogens and testosterone and respectively
(c) Androgens and testosterone respectively
                                                                               ( 1 mark )
(d) Estrogens and progestrone respectively
(Q.37) Connections between input nerve and output nerve where they meet
first forms:
(a) Reflex arc
(b) Cranial nerves                                                             ( 1 mark )
(c) Spinal nerves
(d) Neuromuscular junction
(Q.38) In order to perform an action or movement animal muscles:
(a) Change their shape and shorten
(b) Change their shape and bulge
                                                                      ( 1 mark )
(c) Do not change their shape(d) They shift to the target organ
(Q.39) Which one of the following is positively hydrotropic:
(a) Leaves
(b) Stem
(c) Flowers                                                           ( 1 mark )
(d) Roots
(Q.40) The time and amount of hormone released is controlled by:
(a) Pars distalis
(b) Endocrine glands
(c) Feedback mechanism                                                ( 1 mark )
(d) Hypothalamus
(Q.41) Which of the following is not regulated by the hormones?
(a) Metabolism
(b) Growth
(c) Sexual development                                                ( 1 mark )
(d) Thinking
(Q.42) The term geotropism means:
(a) Study of different layers of earth
(b) Shifting of earth centre
(c) Growth of plant parts towards gravity of the earth
                                                                      ( 1 mark )
(d) Putting seeds into soil bed
(Q.43) Which of the following can be quoted as the best example for
Chemotropism.
(a) Pollen tubes
(b) Flowers
(c) Roots                                                             ( 1 mark )
(d) Stem
(Q.44) Where are hormones poured into the body?
(a) Blood stream
(b) Pancreas
(c) Intestine(d) Brain
(Q.45) The nervous system consists of a series of:                    ( 1 mark )
(a) Cytons
(b) Neurons
(c)Dendrons
(d) Axons
(Q.46)Which one of the following is an involuntary action?            ( 1 mark )
(a) Breathing
(b)Cycling
(c)Walking
(d)Picking
(Q.47)The coordination by chemicals is brought about by:              ( 1 mark )
(a) The endocrine system
(b)Spinal cord
(c)Nervous system
(d)Brain
(Q.48) Iodine is necessary for which endocrine gland:                 ( 1 mark )
(a) Gonads                                                            ( 1 mark )
(b) Hypothalamus
(c) Thymus(d) Thyroid
(Q.49) Example of chemical coordination in plants is:
(a) Seed germination
(b) Growth of hairs
(c) Seed shape in pea
                                                                                ( 1 mark )
(d) Development of cambium
(Q.50) The entire path of detecting the signal or the input and responding to
itby an output action is commonly called as:
(a) Impulse
(b) Synapse
(c) Reflex                                                                      ( 1 mark )
(d) Stimulus
(Q.51) What is an endocrine system?
(a) A system of electrical impulses to transmit messages
(b) A collection of glands that produce hormones
(c) A collection of nerves that produce reflexes                                ( 1 mark )
(d) A groups of neurosecretory cells which secrete hormones
(Q.52) Plant hormones:
(a) shape the plant
(b) effect water transporation in plant
(c) effect in pollination
                                                                                ( 1 mark )
(d) effect in seed dispersal
(Q.53) Activities like walking, riding a bicycle, picking up a pencil are
controlled by
a) Fore brain
(b) Hind brain
(c) Mid brain                                                                   ( 1 mark )
(d) Spinal cord
(Q.54)Back bone is also called as
(a) Spinal cord
(b)Notochord
(c)Vertebral column
d)Nerve cord
(Q.55) Which of the following is not an endocrine gland?                        ( 1 mark )
(a) Pineal
(b) Thyroid
(c) Pancreas                                                                    ( 1 mark )
(d) Sweat
(Q.56) Which of the following part of the brain gives rise to spinal cord?
(a) Medulla oblongata
(b) Cerebrum
(c) Cerebellum                                                                  ( 1 mark )
(d) Mid brain
(Q.57) Plants hormones are:
(a) Nutrients
(b) Chemicals(c) Minerals(d) Vitamins
(Q.58) The production of hormones occurs:                                       ( 1 mark )
(a) In xylem
(b) In phloem
                                                                                ( 2 Marks )
(c) In cortical cells(d) In meristematic cells
(Q.59) What are plant hormones? What is the relationship between their site
of production and site of action?
(Q.60) What is insulin? Where is it produced?                                  ( 2 Marks )
 (Q.61) How are the time and amount of hormone released, controlled?
                                                                               ( 2 Marks )
Explain with example.
(Q.62) What are the two ways of control and coordination in animals?           (2   Marks )
(Q.63) What are two different types of plant movements?                        (2   Marks )
 (Q.64) Name the hormones secreted at puberty in males and females?            (2   Marks )
 (Q.65) Does thinking also involve the creation of nerve impulses?             (2   Marks )
(Q.66) How are the brain and spinal cord protected in human body?              (2   Marks )
(Q.67) How do animal muscles move in order to perform an action or
                                                                               ( 3 Marks )
movement?
(Q.68) How are the animal movements different from that of plant
                                                                               ( 3 Marks )
movements?
(Q.69) Explains the terms geotropism, hydrotropism and chemotropism each
                                                                               ( 3 Marks )
with one example.
(Q.70) Why is iodine salt necessary for our body?                              ( 3 Marks )
(Q.71) Why are some people very short and others very tall?                    ( 3 Marks )
(Q.72) What is reflex arc? Where is it formed?                                 ( 3 Marks )
 (Q.73) What are involuntary actions? Name few. Which parts of brain control
                                                                               ( 3 Marks )
these actions?
 (Q.74) How are the information and decision processed in the forebrain?       ( 3 Marks )
(Q.75) What is the general scheme of nerve impulses traveling in our body?     ( 5 Marks )
(Q.76) Draw the well-labelled figures of human brain.                          ( 5 Marks )

				
DOCUMENT INFO